[Experimental and theoretical analysis of the role of cholinergically induced local non-excitability in atrial fibrillation and flutter].

Excitation of vagal nerves results in the emergence of temporarily inexcitable regions in atria. The fact is shown using microelectrode techniques and the mapping of excitation on frog atria isolated together with vago-sympathetic trunks. These regions serve as unidirectional block and functional obstacle provoking reentry-type arrhythmia.